유한요소법 기반의 자기유도방식 무선전력전송 시스템의 전자파 노출도 분석

In this study, the electronic wave exposure resulting from the application of an induction wireless power transfer system to an automotive seat is analyzed based on finite element method results. Electromagnetic protection standards categorize exposure limits into basic restrictions and reference levels, with a focus on the latter. The physical characteristics of electronic wave exposure are examined using a single wireless power transfer system. Electromagnetic exposure is inversely related to mutual inductance, indicating that the misalignment of the wireless power transfer system not only reduces efficiency but also increases magnetic flux density, thereby increasing the electromagnetic wave exposure of the human body. In the proposed design, compliance with the electromagnetic wave exposure regulations is achieved at a seat height of approximately 300 mm without the need for shielding. However, the use of aluminum rails, which are known for their high conductivity, achieves a shielding effectiveness of approximately 97%, meeting the exposure regulations.